Newton, Isaac, Philosophia naturalis principia mathematica, 1713
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                  ciei occurrens in
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                  K
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                  &
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                  L.
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                  Et velocitas aquæ effluentis per fora­
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                  men
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                  EF
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                  ea erit quam aqua cadendo ab
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                  I
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                  & caſu ſuo deſcribendo
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                  altitudinem
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                  IG
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                  acquirere poteſt. </s>
                  <s>Ideoque per Theoremata
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                  Galilæi
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                  erit
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                  IG
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                  ad
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                  IH
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                  in duplicata ratione velocitatis aquæ per foramen
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                  effluentis ad velocitatem aquæ in circulo
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                  AB,
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                  hoc eſt, in dupli­
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                  cata ratione circuli
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                  AB
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                  ad circulum
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                  EF
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                  ; nam hi circuli ſunt re­
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                  ciproce ut velocitates aquarum quæ per ipſos, eodem tempore &
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                  æquali quantitate, adæquate tranſeunt. </s>
                  <s>De velocitate aquæ hori­
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                  zontem verſus hic agitur. </s>
                  <s>Et motus horizonti parallelus quo par­
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                  tes aquæ cadentis ad invicem accedunt, cum non oriatur a gravi­
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                  tate, nec motum horizonti perpendicularem à gravitate oriundum
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                  mutet, hic non conſideratur. </s>
                  <s>Supponimus quidem quod partes
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                  aquæ aliquantulum cohærent, & per cohæſionem ſuam inter ca­
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                  dendum accedant ad invicem per motus horizonti parallelos, ut
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                  unicam tantum efforment cataractam & non in plures cataractas
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                  dividantur: ſed motum horizonti parallelum, a cohæſione illa ori­
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                  undum, hic non conſideramus.
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                  DE MOTU
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                  CORPORUM</s>
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                  Cas.
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                  1. Concipe jam cavitatem totam in vaſe, in circuitu aquæ
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                  cadentis
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                  ABNFEM,
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                  glacie plenam eſſe, ut aqua per glaciem
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                  tanquam per infundibulum tranſeat. </s>
                  <s>Et ſi aqua glaciem tantum
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                  non tangat vel, quod perinde eſt, ſi tangat & per glaciem propter
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                  ſummam ejus polituram quam liberrime & ſine omni reſiſtentia la­
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                  batur; hæc defluet per foramen
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                  EF
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                  eadem velocitate ac prius, &
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                  pondus totum columnæ aquæ
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                  ABNFEM
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                  impendetur in deflu­
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                  xum ejus generandum uti prius, & fundum vaſis ſuſtinebit pon­
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                  dus glaciei columnam ambientis.
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                  <s>Liqueſcat jam glacies in vaſe; & effluxus aquæ quoad velocita­
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                  tem, idem manebit ac prius. </s>
                  <s>Non minor erit, quia glacies in aquam
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                  reſoluta conabitur deſcendere: non major, quia glacies in aquam
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                  reſoluta non poteſt deſcendere niſi impediendo deſcenſum aquæ
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                  alterius deſcenſui ſuo æqualem. </s>
                  <s>Eadem vis eandem aquæ effluen­
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                  tis velocitatem generare debet.
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                  </s>
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                  <s>Sed foramen in fundo vaſis, propter obliquos motus particula­
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                  rum aquæ effluentis, paulo majus eſſe debet quam prius. </s>
                  <s>Nam par­
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                  ticulæ aquæ jam non tranſeunt omnes per foramen perpendicula­
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                  riter; ſed a lateribus vaſis undique confluentes & in foramen con­
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                  vergentes, obliquis tranſeunt motibus; & curſum ſuum deorſum
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                  flectentes in venam aquæ exilientis conſpirant, quæ exilior eſt pau­
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                  lo infra foramen quam in ipſo foramine, exiſtente ejus diametro
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                  ad diametrum foraminis ut 5 ad 6, vel 5 1/2 ad 6 1/2 quam proxime, ſi </s>
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